2011 National Energy Code of Canada for Buildings
(NECB)
Errata Package
Selected replacement pages have been produced for the NECB.
Please print and insert in your copy of the Code.
Errata
Issued by the Canadian Commission on Building and Fire Codes
The Change History table that follows describes errata and editorial updates that apply to the
National Energy Code of Canada for Buildings 2011:
• Errata are corrections to existing text.
• Editorial updates are provided for information purposes only.
Code pages containing errata are identified with the words “Amended Page” in the footer;
pages with editorial updates and index pages with changes are not flagged.
Contact your local authority having jurisdiction to find out if these errata apply in your
province or territory.
National Energy Code of Canada for Buildings 2011
xv
Preface
Change History — National Energy Code of Canada for Buildings 2011
Division
Code
Reference
Change
Date
(Y-M-D)
Description of Change
B
Table
1.3.1.2.
erratum
2012-12-21 Entry was added for standard “DOE 10 CFR, Part 430-2011”
B
Table
1.3.1.2.
erratum
2012-12-21 Entry for NRCan standard was corrected to read “SOR/94-651-2008”
B
1.3.2.1.(1)
editorial
update
2012-12-21 Entry was added for DOE
B
3.2.1.4.(1)
erratum
2012-12-21 Equations for FDWR values were modified for clarity
B
Table
3.5.1.1.
erratum
2012-12-21 Attributions for Sentences 3.2.4.4.(2) and (3) were deleted
B
4.2.3.1.(3)
erratum
2012-12-21 Sentence was corrected to read “... shall not be greater than the individual allowance for that
application taken from Table 4.2.3.1.C. ...”
B
5.2.5.3.(5)
erratum
2012-12-21 Ratio was corrected to read “u2/u1”
B
5.2.5.3.(6)
erratum
2012-12-21 Ratio was corrected to read “u2/u1”
B
5.2.10.2.(2)
erratum
2012-12-21 Sentence was corrected to read “... that provides at least 80% of the dehumidification ...”
B
Table
5.2.12.1.
erratum
2012-12-21 Table Note (5) was added to entries for furnaces
B
Table
5.5.1.1.
erratum
2012-12-21 Attribution for Sentence 5.2.5.3.(2) was deleted
B
Table
6.2.2.1.
erratum
and
editorial
update
2012-12-21 Under entry for gas-fired service water heaters, input value “22–117 kW” was deleted
Table Note (5) was deleted
B
6.2.3.1.(2)
erratum
2012-12-21 Ratio was corrected to read “u2/u1”
B
6.2.3.1.(3)
erratum
2012-12-21 Ratio was corrected to read “u2/u1”
B
Table
6.2.3.1.
erratum
2012-12-21 Second value under column entitled “Mean Rating Temperature, °C” was corrected to read “38”
B
Table
6.5.1.1.
erratum
2012-12-21 Attribution was added for Sentence 6.2.1.1.(1)
B
7.2.4.1.(1)
erratum
2012-12-21 Reference in Sentence was corrected to read “... Tables 3 and 5 of CSA C390, ...”
B
Table
8.4.4.22.A.
erratum
2012-12-21 In entry for Furnace Part-Load Performance Curve(s), values listed for variable c under
Condensing Furnace and Atmospheric Furnace were interchanged
B
Table
8.5.1.1.
erratum
2012-12-21 Functional Statement F99 was deleted from attribution for Clauses 8.4.4.20.(3)(b) and (c)
Index
Letter H
erratum
2012-12-21 Reference under Heaters/heating systems, recessed, was corrected to read “3.2.1.2.”
Reference under Heating, ventilating and air-conditioning (HVAC) systems, baseboard
heaters, was corrected to read “3.2.1.2.”
xvi
National Energy Code of Canada for Buildings 2011
Division B
1.3.1.2.
Table 1.3.1.2. (Continued)
Issuing
Agency
AHRI
ANSI/AHRI 390-2003
Performance Rating of Single Package Vertical Air-Conditioners and Heat Pumps
Table 5.2.12.1.
AHRI
ANSI/AHRI 1060-2005
Performance Rating of Air-to-Air Exchangers for Energy Recovery Ventilation
5.2.10.1.(5)
AMCA
500-89
Louvers, Dampers and Shutters
5.2.4.2.(2)
ANSI/CSA
Gas Water Heaters – Volume III, Storage Water Heaters With Input Ratings Above Table 6.2.2.1.
75,000 Btu Per Hour, Circulating and Instantaneous
Table 5.2.12.1.
Gas-Fired Low Pressure Steam and Hot Water Boilers
ASHRAE
ANSI Z21.10.3-2004/
CSA 4.3-04
ANSI Z21.13-2004/
CSA 4.9-04
ANSI Z21.47-2006/
CSA 2.3-2006
ANSI Z21.56-2006/
CSA 4.7-2006
ANSI Z83.8-2006/
CSA 2.6-2006
2009
ASHRAE
ANSI/CSA
Document Number (1)
Document Title (2)
Code Reference
Gas-Fired Central Furnaces
Table 5.2.12.1.
Gas-Fired Pool Heaters
Table 6.2.2.1.
Gas Unit Heaters, Gas Packaged Heaters, Gas Utility Heaters and Gas-Fired
Duct Furnaces
ASHRAE Handbook – Fundamentals
Table 5.2.12.1.
ANSI/ASHRAE 127-2007
Rating Computer and Data Processing Room Unitary Air-Conditioners
Table 5.2.12.1.
ASHRAE
ANSI/ASHRAE 140-2007
Evaluation of Building Energy Analysis Computer Programs
ASME
PTC 4-2008
Fired Steam Generators - Performance Test Codes
3.3.4.4.(4)
8.4.2.2.(5)
Table 5.2.12.1.
ASME/CSA
Plumbing Supply Fittings
ASTM
ASME A112.18.1-05/
CAN/CSA-B125.1-05
C 177-10
ASTM
C 335/C 335M-05
ASTM
C 518-10
ASTM
C 1363-05
ASTM
E 283-04
CCBFC
NRCC 53301
National Building Code of Canada 2010
CCBFC
NRCC 53302
National Plumbing Code of Canada 2010
CSA
CSA
AAMA/WDMA/CSA
101/I.S.2/A440-08
A440.2-09/A440.3-09
CSA
CAN/CSA-B125.3-05
NAFS – North American Fenestration Standard/Specification for Windows, Doors,
and Skylights
Fenestration Energy Performance/User Guide to CSA A440.2-09, Fenestration
Energy Performance
Plumbing Fittings
CSA
CAN/CSA-B140.4-04
Oil-Fired Warm Air Furnaces
6.2.6.1.(1)
6.2.6.2.(1)
Table 5.2.12.1.
CSA
CAN/CSA-B211-00
Energy Efficiency of Oil-Fired Storage Tank Water Heaters
Table 6.2.2.1.
CSA
B212-00
Energy Utilization Efficiencies of Oil-Fired Furnaces and Boilers
Table 5.2.12.1.
ANSI/CSA
ANSI/CSA
ANSI/CSA
Steady-State Heat Flux Measurements and Thermal Transmission Properties by
Means of the Guarded-Hot-Plate Apparatus
Steady-State Heat Transfer Properties of Pipe Insulation
Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter
Apparatus
Thermal Performance of Building Materials and Envelope Assemblies by Means
of a Hot Box Apparatus
Determining Rate of Air Leakage Through Exterior Windows, Curtain Walls, and
Doors Under Specified Pressure Differences Across the Specimen
National Energy Code of Canada for Buildings 2011
3.1.1.5.(4)
6.2.6.1.(1)
6.2.6.2.(1)
3.1.1.5.(1)
5.2.5.3.(7)
6.2.3.1.(4)
3.1.1.5.(1)
3.1.1.5.(4)
3.1.1.5.(5)
3.2.4.3.(2)
3.2.4.4.(1)
to (3)
1.1.1.1.(1) (3)
1.1.1.3.(1) (3)
1.1.1.3.(2) (3)
1.1.4.1.(1)
1.4.1.2.(1) (3)
3.1.1.5.(1)
3.2.2.1.(3)
5.2.1.1.(1)
5.2.2.1.(1)
5.2.2.8.(2)
5.2.5.1.(1)
5.2.10.4.(2)
6.2.1.1.(1)
3.2.4.3.(3)
3.2.4.3.(4)
3.1.1.5.(3)
Division B 1-3
1.3.1.2.
Division B
Table 1.3.1.2. (Continued)
Issuing
Agency
CSA
CAN/CSA-C191-04
Electric Storage Tank Water Heaters for Domestic Hot Water Service
Table 6.2.2.1.
CSA
CAN/CSA-C368.1-M90
Room Air Conditioners
Table 5.2.12.1.
CSA
C390-10
7.2.4.1.(1)
CSA
CAN/CSA-C439-09
Test Methods, Marking Requirements, and Energy Efficiency Levels for
Three-Phase Induction Motors
Rating the Performance of Heat/Energy-Recovery Ventilators
CSA
C654-M91
Fluorescent Lamp Ballast Efficacy Measurements
4.2.1.2.(1) and (2)
CSA
CAN/CSA-C656-05
Split-System and Single-Package Central Air Conditioners and Heat Pumps
Table 5.2.12.1.
CSA
CAN/CSA-C743-09
Rating Packaged Water Chillers
Table 5.2.12.1.
CSA
CSA
CAN/CSA-C746-06
Packaged Terminal Air Conditioners and Heat Pumps (Bi-National Standard,
with ARI 310/380-2004)
Energy Efficiency of Electric Storage Tank Water Heaters and Heat Pump Water
Heaters
Rating Large and Single Packaged Vertical Air Conditioners and Heat Pumps
Table 5.2.12.1.
CSA
ARI 310/380-2004/
CAN/CSA-C744-04
CAN/CSA-C745-03
CSA
C748-94
Direct-Expansion (DX) Ground-Source Heat Pumps
Table 5.2.12.1.
CSA
CAN/CSA-C802.1-00
Minimum Efficiency Values for Liquid-Filled Distribution Transformers
7.2.3.1.(1)
CSA
CAN/CSA-C802.2-06
Minimum Efficiency Values for Dry-Type Transformers
7.2.3.1.(1)
CSA
CAN/CSA-C802.3-01
Maximum Losses for Power Transformers
7.2.3.1.(1)
Document Number (1)
Document Title (2)
Code Reference
5.2.10.4.(2)
Table 6.2.2.1.
Table 5.2.12.1.
CSA
CAN/CSA-C828-06
Thermostats Used with Individual Room Electric Space Heating Devices
5.2.8.5.(4)
CSA
CAN/CSA-C860-07
Internally Lighted Exit Signs
4.2.1.1.(1)
CSA
CAN/CSA-C13256-1-01
Table 5.2.12.1.
CSA
CAN/CSA-C13256-2-01
CSA
CSA
CAN/CSA-F379
SERIES-09
CAN/CSA-P.3-04
Water-Source Heat Pumps - Testing and Rating for Performance - Part 1:
Water-to-Air and Brine-to-Air Heat Pumps (Adopted ISO 13256-1:1998, with
Canadian Deviations)
Water-Source Heat Pumps - Testing and Rating for Performance - Part 2:
Water-to-Water and Brine-to-Water Heat Pumps (Adopted ISO 13256-2:1998,
with Canadian Deviations)
Packaged Solar Domestic Hot Water Systems (Liquid-to-Liquid Heat Transfer)
CTI
Table 5.2.12.1.
6.2.2.3.(1)
Measuring Energy Consumption and Determining Efficiencies of Gas-Fired
Storage Water Heaters
Table 6.2.2.1.
201(04)
Certification of Water-Cooling Tower Thermal Performance
Table 5.2.12.1.
DOE
10 CFR, Part 430-2011
Energy, Energy Conservation Program for Consumer Products
Table 6.2.2.1.
HRAI
SAR-G1
HRAI Digest 2005
1.1.4.2.(1)
ISO
13790:2008
1.1.4.2.(1)
NEMA
NEMA ANSI C82.11:2002
Energy performance of buildings – Calculation of energy use for space heating
and cooling
High-Frequency Fluorescent Lamp Ballasts
NFRC
100-2010
Determining Fenestration Product U-factors
3.1.1.5.(3)
NRCan
SOR/94-651-2008
Energy Efficiency Act and its Regulations
SMACNA
ANSI/SMACNA 006-2006
HVAC Duct Construction Standards – Metal and Flexible
SMACNA
1985
HVAC Air Duct Leakage Test Manual
5.2.12.3.(1)
6.2.2.4.(1)
6.2.2.5.(1)
5.2.2.3.(1)
Table 5.2.2.3.
5.2.2.4.(1)
4.2.1.2.(2)
Notes to Table 1.3.1.2.:
(1)
(2)
(3)
Some documents may have been reaffirmed or reapproved. Check with the applicable issuing agency for up-to-date information.
Some titles have been abridged to omit superfluous wording.
Code reference is in Division A.
1-4 Division B
Amended Page
National Energy Code of Canada for Buildings 2011
Division B
1.3.2.1.
1.3.2.
Organizations
1.3.2.1.
Abbreviations of Proper Names
1) The abbreviations of proper names in this Code shall have the meanings
assigned to them in this Article (the appropriate addresses of the organizations are
shown in brackets).
AAMA ......... American Architectural Manufacturers Association (1827 Walden
Office Square, Suite 550, Schaumburg, Illinois 60173-4268 U.S.A.;
www.aamanet.org)
AHAM ......... Association of Home Appliance Manufacturers (111 19th Street, NW,
Suite 402, Washington, D.C. 20036 U.S.A.; www.aham.org)
AHRI ........... Air-Conditioning, Heating and Refrigeration Institute (2111
Wilson Boulevard, Suite 500, Arlington, Virginia 22201 U.S.A.;
www.ahrinet.org)
AMCA ......... Air Movement and Control Association (30 West University Drive,
Arlington Heights, Illinois 60004 U.S.A.; www.amca.org)
ANSI ............ American National Standards Institute (25 West 43rd Street, 4th Floor,
New York, New York 10036 U.S.A.; www.ansi.org)
ASHRAE ..... American Society of Heating, Refrigerating and Air-Conditioning
Engineers (1791 Tullie Circle, NE, Atlanta, Georgia 30329 U.S.A.;
www.ashrae.org)
ASME .......... American Society of Mechanical Engineers (Three Park Avenue, New
York, New York 10016-5990 U.S.A.; www.asme.org)
ASTM .......... American Society for Testing and Materials International (100 Barr
Harbor Drive, West Conshohoken, Pennsylvania 19428-2959 U.S.A.;
www.astm.org)
CAN ............. National Standard of Canada designation
CCBFC ......... Canadian Commission on Building and Fire Codes (National Research
Council of Canada, Ottawa, Ontario K1A 0R6; www.nationalcodes.ca)
CSA .............. Canadian Standards Association (5060 Spectrum Way, Suite 100,
Mississauga, Ontario L4W 5N6; www.csa.ca)
CTI ............... Cooling Technology Institute (P.O. Box 73383, Houston, Texas
77273-3383 U.S.A.; www.cti.org)
DOE ............. Department of Energy (1000 Independence Avenue, SW, Washington,
D.C. 20585 U.S.A.; http://energy.gov)
HRAI ........... Heating, Refrigeration and Air Conditioning Institute of Canada
(2800 Skymark Avenue, Building 1, Suite 201, Mississauga, Ontario
L4W 5A6; www.hrai.ca)
HVI .............. Home Ventilating Institute (1000 N. Rand Road, Suite 214, Wauconda,
Illinois 60084 U.S.A.; www.hvi.org)
IESNA .......... Illuminating Engineering Society of North America (120 Wall Street,
Floor 17, New York, New York 10005-4001 U.S.A.; www.iesna.org)
ISO ............... International Organization for Standardization (Standards Council
of Canada, 270 Albert Street, Suite 200, Ottawa, Ontario K1P 6N7;
www.iso.org)
NBC ............. National Building Code of Canada 2010 (see CCBFC)
NECB ........... National Energy Code of Canada for Buildings 2011
NEMA ......... National Electrical Manufacturers Association (1300 North 17th Street,
Suite 1752, Rosslyn, Virginia 22209 U.S.A.; www.nema.org)
NFRC ........... National Fenestration Rating Council (6305 Ivy Lane, Suite 140,
Greenbelt, Maryland 20770 U.S.A.; www.nfrc.org)
NPC ............. National Plumbing Code of Canada 2010 (see CCBFC)
National Energy Code of Canada for Buildings 2011
Division B 1-5
1.3.2.1.
Division B
NRC ............. National Research Council of Canada (Ottawa, Ontario K1A 0R6;
www.nrc-cnrc.gc.ca)
NRCan ......... Natural Resources Canada (www.nrcan.gc.ca)
SMACNA .... Sheet Metal and Air Conditioning Contractors’ National Association
(4201 Lafayette Center Drive, Chantilly, Virginia 20151-1219 U.S.A.;
www.smacna.org)
TIAC ............ Thermal Insulation Association of Canada (1485 Laperrière Avenue,
Ottawa, Ontario K1Z 7S8; www.tiac.ca)
U.S. Gov’t .... U.S. Government Printing Office (732 North Capitol Street, NW,
Washington, D.C. 20401-0001 U.S.A.; www.gpo.gov)
WDMA ........ Window & Door Manufacturers Association (401 N. Michigan Avenue,
Suite 2200, Chicago, Illinois 60611 U.S.A.; www.wdma.com)
1-6 Division B
National Energy Code of Canada for Buildings 2011
Division B
3.2.1.2.
balcony slabs, beams, girders, columns, and ornamentation or appendages that must
completely penetrate the building envelope to perform their intended function need not
be taken into account, provided that the sum of the cross-sectional areas at such major
structural penetrations is limited to a maximum of 2% of the above-ground building
envelope area. (See Appendix A.)
5) Where a component of the building envelope is protected by an enclosed
unconditioned space, such as a sun porch, enclosed veranda or vestibule, the
unconditioned enclosure may be considered to have an overall thermal transmittance of
6.25 W/(m2·K), which is equivalent to that of one layer of glass. (See Appendix A.)
6) For the purposes of this Article, roof assemblies shall be considered to include
all related structural framing.
7) For the purposes of this Article, wall assemblies inclined less than 60° from the
horizontal shall be considered as roof assemblies, and roof assemblies inclined 60° or
more from the horizontal shall be considered as wall assemblies.
8) For the purposes of this Article, wall assemblies shall be considered to include
all related structural framing and perimeter areas of intersecting interior walls but
shall not include the perimeter areas where floor or roof slabs interrupt the wall’s
construction. (See Appendix A.)
9) For the purposes of this Article, floor assemblies shall be considered to include
all related structural framing.
Section 3.2. Prescriptive Path
3.2.1.
General
3.2.1.1.
Protection of Insulation Materials
1) Except as provided in Sentence (2), the building envelope shall be designed to
avoid increasing the overall thermal transmittance of the insulation material due to
a) air leakage or convection,
b) wetting, or
c) moisture bypassing the plane of thermal resistance.
(See Appendix A.)
2) Where any of the conditions described in Clauses (1)(a) to (c) occur as a result
of the designed building envelope system, their effect on the overall thermal transmittance
of the insulation material shall be calculated in accordance with Article 3.1.1.5.
3.2.1.2.
Continuity of Insulation
1) Except as provided in Sentences (2) to (6), interior building components that
intersect with components of the building envelope and major structural members that
partly penetrate the building envelope shall not break the continuity of the insulation
and shall not increase the overall thermal transmittance at their projected area to more
than that permitted in Section 3.2. (See Appendix A.)
2) Where an interior wall penetrates an exterior wall or insulated roof or ceiling
and breaks the continuity of the building envelope, it shall be insulated
a) on both of its sides inward or outward from the building envelope for a
distance equal to 4 times the uninsulated thickness of the penetrating wall,
and
b) to an overall thermal transmittance no more than that required for the exterior
wall.
National Energy Code of Canada for Buildings 2011
Division B 3-3
3.2.1.3.
Division B
3) Where an ornamentation or appendage other than a balcony slab or canopy
slab penetrates an exterior wall and breaks the continuity of the building envelope, it
shall be insulated
a) on both of its sides inward or outward from the building envelope for a
distance equal to 4 times the thickness of the penetrated wall, and
b) to an overall thermal transmittance no more than that required for the exterior
wall.
4) Where building envelope assemblies in the same plane intersect but their
respective expanses of insulation do not, one of the two expanses of insulation shall be
extended beyond the intersecting assembly for a distance equal to at least 4 times the
distance separating the two expanses of insulation. (See Appendix A.)
5) Where mechanical ducts and chases or electrical system components, such as
pipes, ducts, conduits, cabinets, panels, or recessed heaters, are placed within and
parallel to the building envelope, the overall thermal transmittance of the building envelope
at the projected area of the mechanical or electrical system components shall not be
increased.
6) Except as provided in Sentence (4), joints between components of the building
envelope, such as expansion or construction joints or joints between walls and doors
or fenestration, shall be insulated in a manner that provides continuity across such
joints. (See Appendix A.)
3.2.1.3.
Spaces Heated to Different Temperatures
1) The overall thermal transmittance, U1, of building assemblies separating conditioned
spaces that are intended to be heated to temperatures that differ by more than 10°C
shall not be greater than that obtained with the following equation:
where
t1 = indoor heating design temperature of the colder conditioned space, in °C,
t2 = indoor heating design temperature of the warmer conditioned space, in °C,
t0 = outdoor 2.5% January design temperature as specified in Article 1.1.4.1.,
in °C, and
U = overall thermal transmittance required in Sentences 3.2.2.2.(1), 3.2.2.3.(2)
and 3.2.2.4.(1), in W/(m2·K).
(See Appendix A.)
3.2.1.4.
Allowable Fenestration and Door Area
1) The maximum allowable total vertical fenestration and door area to gross wall
area ratio (FDWR), determined in accordance with Article 3.1.1.6., shall be as follows:
where
HDD = the heating degree-days of the location of the building determined according
to Sentence 1.1.4.1.(1).
(See Appendix A.)
2) The total skylight area shall be less than 5% of the gross roof area as determined
in Article 3.1.1.6.
3-4 Division B
Amended Page
National Energy Code of Canada for Buildings 2011
Division B
4.2.3.1.
illuminated shall not be greater than the individual allowance for that application
taken from Table 4.2.3.1.C. for the applicable lighting zone plus any unused power
applied from the basic site allowance listed in Table 4.2.3.1.B. (See Appendix A.)
Table 4.2.3.1.B.
Basic Site Allowances for Exterior Lighting
Forming Part of Sentences 4.2.3.1.(2) and (3)
Basic Site Allowance According to Lighting Zone
Zone 0
Zone 1
Zone 2
Zone 3
Zone 4
No allowance
500 W
600 W
750 W
1300 W
4) Except as provided in Sentence (5), the connected exterior lighting power
for all general building exterior applications not listed in Table 4.2.3.1.C. that are to
be illuminated shall not be greater than the sum of the individual allowances for
these applications provided in Table 4.2.3.1.D. for the applicable lighting zone plus
any remaining basic site allowance not used in compliance with Sentence (3). (See
Appendix A.)
Table 4.2.3.1.C.
Lighting Power Allowances for Specific Building Exterior Applications
Forming Part of Sentences 4.2.3.1.(3) and (4)
Exterior Application
Lighting Power Allowances According to Lighting Zone
Zone 0
Zone 1
Zone 2
Zone 3
Zone 4
No allowance
for each
1.1
illuminated wall or
surface, or 8.2 W/m
for each illuminated
wall or surface length
for each
1.6
illuminated wall or
surface, or 12.3 W/m
for each illuminated
wall or surface length
2.2 W/m2 for each
illuminated wall or
surface, or 16.4 W/m
for each illuminated
wall or surface length
W/m2
Building facades
(facade lighting)
Automated teller
machines (ATM) and
night depositories
Entrances and
gatehouse inspection
stations at guarded
facilities
Loading areas for
law enforcement, fire,
ambulance and other
emergency service
vehicles
A single luminaire
of 60 W or less may
be installed for each
roadway or parking
entry, trail head, and
toilet facility, or other
locations approved by
the authority having
jurisdiction
W/m2
270 W per location plus 90 W per additional ATM per location
8.1 W/m2 of covered and uncovered area
5.4 W/m2 of covered and uncovered area
Drive-up windows and
doors
400 W per drive-through
Parking near 24-hour
retail entrances
800 W per main entry
5) The following exterior lighting applications need not comply with Sentences (1)
to (4) where the lighting is equipped with an independent control device that complies
with the requirements of Subsection 4.2.4.:
a) specialized signal, directional, and marker lighting associated with
transportation,
b) lighting for advertising and directional signage,
c) lighting integral to equipment or instrumentation and installed by its
manufacturer,
d) lighting for theatrical purposes, including performance, stage, film and
video production,
National Energy Code of Canada for Buildings 2011
Amended Page
Division B 4-13
4.2.4.1.
Division B
e) lighting for athletic activity areas,
f) temporary lighting,
g) lighting for industrial production, material handling, transportation sites,
and associated storage areas for industrial sites,
h) lighting for theme elements in theme/amusement parks, and
i) lighting used to highlight features of art objects, public monuments and
designated national or provincial historic sites.
Table 4.2.3.1.D.
Lighting Power Allowances for General Building Exterior Applications
Forming Part of Sentence 4.2.3.1.(4)
Exterior Application
Lighting Power Allowances According to Lighting Zone
Zone 0
Zone 1
Zone 2
Zone 3
Zone 4
No allowances
0.4 W/m2
0.7 W/m2
1.1 W/m2
1.4 W/m2
Walkways less than 3 m wide
2.3 W/m
2.3 W/m
2.6 W/m
3.3 W/m
Walkways 3 m wide or greater, plaza
areas, special feature areas
1.5 W/m2
1.5 W/m2
1.7 W/m2
2.2 W/m2
8.1 W/m2
11.0 W/m2
11.0 W/m2
11.0 W/m2
W/m2
W/m2
W/m2
3.2 W/m2
Uncovered Parking Areas
Parking areas and drives
Building Grounds
Stairways
No allowances
Pedestrian tunnels
1.6
Landscape lighting
0.4 W/m2
0.5 W/m2
0.5 W/m2
0.5 W/m2
66 W/m of door
width
66 W/m of door
width
98 W/m of door
width
98 W/m of door
width
66 W/m of door
width
66 W/m of door
width
66 W/m of door
width
66 W/m of door
width
2.7 W/m2
2.7 W/m2
4.3 W/m2
4.3 W/m2
6.5 W/m2
6.5 W/m2
8.6 W/m2
11.0 W/m2
2.7 W/m2
2.7 W/m2
5.4 W/m2
7.5 W/m2
No allowance
33 W/m
33 W/m
98 W/m
1.6
2.2
Exterior Entrances and Exterior Exits
Main entries
No allowances
Other doors
Entry canopies
Sales Canopies
Free-standing and attached
No allowances
Outdoor Sales
Open areas (including vehicle sales
lots)
Street frontage for vehicle sales lots in
addition to “open area” allowance
No allowances
4.2.4.
Exterior Lighting Controls
4.2.4.1.
Requirements
1) Except as provided in Sentences (2) and (3), exterior lighting shall be controlled
by
a)
b)
c)
d)
4-14
Division B
astronomical time controls,
photosensors,
a combination of photosensors and timer shut-off switch, or
other types of controls that perform the same function as those referred to
in Clauses (a) to (c).
National Energy Code of Canada for Buildings 2011
Division B
5.2.3.2.
5.2.4.2.
Constant-Volume Fan Systems
1) Where fans produce a constant airflow rate whenever the system is operating,
the power demand required by the motors for the combined supply and return fan
system at design conditions shall not exceed 1.6 W per L/s of supply air delivered to
the conditioned space, calculated using the following equation:
where
W = power demand, in watts,
F = design flow rate, in L/s,
SP = design static pressure across the fan, in Pa, and
η = combined fan-drive-motor efficiency, expressed as a decimal fraction.
(See Appendix A.)
5.2.3.3.
Variable-Air-Volume Fan Systems
1) For fan systems through which airflow varies automatically as a function of
load, the power demand required by the motors for the combined supply and return
fan system, as calculated using the equation in Sentence 5.2.3.2.(1), shall not exceed
2.65 W per L/s of supply air delivered to the conditioned space at design conditions.
(See Appendix A.)
2) In variable-air-volume systems, any individual supply, relief or return fan with
a power demand greater than 7.5 kW and less than 25 kW, as calculated using the
equation in Sentence 5.2.3.2.(1), shall incorporate controls and devices such that, if air
delivery volume is reduced to 50% of design air volume, the corresponding fan power
demand will be no more than 55% of design wattage, based on the manufacturer‘s
test data.
3) In variable-air-volume systems, any individual supply, relief or return fan with
a power demand equal to or greater than 25 kW, as calculated using the equation in
Sentence 5.2.3.2.(1), shall incorporate controls and devices necessary to prevent the fan
motor from demanding more than 30% of design wattage at 50% of design air volume,
based on the manufacturer’s test data.
5.2.4.
Air Intake and Outlet Dampers
5.2.4.1.
Required Dampers
1) Except as provided in Sentences (2) to (4), every duct or opening intended to
discharge air from a conditioned space to the outdoors or to unconditioned space, and
every outdoor air intake duct or opening shall be equipped with a motorized damper.
2) Where dampers are not permitted by other regulations, air intakes and outlets
need not comply with Sentence (1).
3) Air intakes and outlets serving HVAC systems required to operate continuously
need not comply with Sentence (1).
4) Where the duct or opening does not exceed 0.08 m2 in cross-sectional area,
air intake dampers required by Sentence (1) are permitted to be manually operated
and air outlet dampers required by Sentence (1) are permitted to consist of gravity
or spring-operated backflow dampers.
5.2.4.2.
Type and Location of Dampers
1) Except as provided in Sentences (3) and (4), dampers required by Article 5.2.4.1.
shall be
a) located as near as possible to the plane of the building envelope, and
b) designed to close automatically when the HVAC system is not in operation.
2) Motorized dampers required in Sentence 5.2.4.1.(1) shall be designed so that,
when the damper is in the closed position, airflow does not exceed 15 L/s per m2 of
National Energy Code of Canada for Buildings 2011
Division B 5-5
5.2.5.1.
Division B
cross-sectional area at a pressure differential of 250 Pa, when tested in accordance with
AMCA 500, “Louvers, Dampers and Shutters.”
3) Dampers required in Article 5.2.4.1. are permitted to be located inboard of
the building envelope, provided the portion of the duct between the damper and the
building envelope is insulated in conformance with Sentence 5.2.2.5.(4) for ducts located
outdoors.
4) Dampers in air intakes and outlets serving air-heating or -cooling equipment
located outside of the building envelope are permitted to be located within the
equipment.
5.2.5.
Piping for Heating, Ventilating and Air-conditioning
Systems
5.2.5.1.
Design and Installation of Piping
1) HVAC piping shall be designed and installed in accordance with the NBC.
5.2.5.2.
Provision for Balancing
1) All hydronic systems shall be designed so that they can be balanced. (See
Appendix A.)
5.2.5.3.
Piping Insulation
1) Except as provided in Sentences (2) to (5), piping forming part of an HVAC
system shall be thermally insulated in accordance with Table 5.2.5.3.
2) Except for suction-line piping of direct expansion systems, piping located
within conditioned space in a dwelling unit and serving only that dwelling unit need
not comply with Sentence (1).
3) HVAC piping located outside the building envelope shall be insulated to the
level specified in Table 5.2.5.3. for heating system piping conveying fluid with design
operating temperatures above 177°C.
4) HVAC piping that conveys fluids with design operating temperatures greater
than 13°C and less than 41°C need not comply with Table 5.2.5.3.
5) Where piping insulation has a thermal conductivity that is greater than the
ranges given in Table 5.2.5.3., the insulation thickness given in the Table shall be
increased by the ratio u2/u1, where u1 is the value at the higher end of the conductivity
range for the operating temperature and u2 is the measured thermal conductivity of
the insulation at the mean rating temperature.
6) Where piping insulation has a thermal conductivity that is lower than the
ranges given in Table 5.2.5.3., the insulation thickness given in the Table may be
decreased by the ratio u2/u1, where u1 is the value at lower end of the conductivity
range for the operating temperature and u2 is the measured thermal conductivity of
the insulation at the mean rating temperature.
7) The thermal conductivity of piping insulation at a mean rating temperature
shall be determined in conformance with ASTM C 335/C 335M, “Steady-State Heat
Transfer Properties of Pipe Insulation.”
8) Insulation material required in Sentence (1) shall be installed in accordance
with good practice. (See A-5.2.2.5.(6) and 5.2.5.3.(8) in Appendix A.)
5-6 Division B
Amended Page
National Energy Code of Canada for Buildings 2011
Division B
5.2.10.1.
5) Vestibules between conditioned spaces and the outdoors shall have a
temperature-control device that limits the maximum heating temperature in the
vestibule to 15°C.
5.2.8.6.
Ice- and Snow-Melting Heater Controls
1) Ice- and snow-melting heaters shall be provided with automatic controls or
readily accessible manual controls that allow them to be shut down when not required.
5.2.8.7.
Control of Temperature of Air Leaving the Supply Air Handler
1) Except as provided in Sentences (2) and (3), a supply air handler shall be designed
and equipped with controls to achieve the design supply air temperature without
a) heating previously cooled air,
b) cooling previously heated air, or
c) heating outdoor air, separately from the return air or mixed with it, in excess
of the minimum required for ventilation.
2) Reheating supply air for humidity control is permitted where specified
humidity levels are required. (See Appendix A.)
3) Reheating supply air is permitted where such reheating will not cause an
increase in energy consumption.
5.2.8.8.
Control of Space Temperature by Reheating or Recooling
1) Except as provided in Sentence (4), HVAC systems that control the temperature
of a space by reheating previously cooled air shall be equipped with controls that
automatically adjust the temperature of the cool air supply to the highest temperature
that will satisfy the temperature-control zone requiring the coolest air.
2) Except as provided in Sentence (4), HVAC systems that control the temperature
of a space by recooling previously heated air shall be equipped with controls that
automatically adjust the temperature of the warm air supply to the lowest temperature
that will satisfy the temperature-control zone requiring the warmest air.
3) Except as provided in Sentence (4), HVAC systems that control the temperature
of a space by mixing heated supply air and cooled supply air shall be equipped with
controls that
a) automatically adjust the temperature of the warm supply air to the lowest
temperature that will satisfy the temperature-control zone requiring the
warmest air, and
b) automatically adjust the temperature of the cool supply air to the highest
temperature that will satisfy the temperature-control zone requiring the
coolest air.
4) HVAC systems that are designed to reduce the air supplied to each
temperature-control zone to no more than 2 L/s per m2 of floor surface area of the
temperature-control zone before reheating, recooling or mixing of supply air takes place
need not comply with Sentences (1) to (3).
5.2.9.
Humidification
5.2.9.1.
Humidification Controls
1) If an HVAC system is equipped with a means for adding or removing moisture
to maintain specific humidity levels in a space, an automatic humidity control device
shall be provided.
5.2.10.
Heat Recovery
5.2.10.1.
Heat-Recovery Systems
1) Except as provided in Sentence (3), when the sensible heat content of an exhaust
air system as calculated in accordance with Sentence (4) exceeds 150 kW, the system
National Energy Code of Canada for Buildings 2011
Division B 5-9
5.2.10.2.
Division B
shall be equipped with a heat-recovery apparatus capable of recovering sensible heat
with a minimum 50% efficiency. (See Appendix A.)
2) Heat recovered in accordance with Sentence (1) shall be used in building
systems.
3) Specialized exhaust systems, such as those used to exhaust smoke, grease-laden
vapours, or toxic, flammable, paint, or corrosive fumes or dust, need not comply with
Sentence (1).
4) The sensible heat, in kW, referred to in Sentence (1), which is the sensible heat
content of the total quantity of exhaust, shall be calculated as follows:
where
Q = rated capacity of exhaust system at normal exhaust air temperature, in L/s,
Te = temperature of exhaust air before heat recovery, in °C, and
To = outdoor 2.5% January design temperature, in °C (see Appendix A).
5) At airflow rates not less than the system design capacity, the
sensible-heat-recovery efficiency of a heat-recovery apparatus referred to in
Sentence (1) shall be determined in conformance with
a) the test method described in ANSI/AHRI 1060, “Performance Rating of
Air-to-Air Exchangers for Energy Recovery Ventilation,” or
b) another acceptable test method.
5.2.10.2.
Heat Recovery from Dehumidification in Swimming Pools
1) Except for pools with a water surface area of less than 10 m2 and except as
provided in Sentence (2), systems that exhaust air from swimming pools within
conditioned spaces shall be capable of recovering at least 40% of the sensible heat from
exhaust air at design conditions, as calculated in accordance with Sentence 5.2.10.1.(4).
(See Appendix A.)
2) Indoor swimming pools need not comply with Sentence (1), provided a
stationary mechanical or desiccant dehumidification system is installed that provides at
least 80% of the dehumidification that would result from compliance with Sentence (1).
5.2.10.3.
Heat Recovery from Ice-making Machines in Ice Arenas and Curling
Rinks
1) Where an ice arena or a curling rink has a heating requirement, the refrigeration
system shall incorporate a means of recovering the heat rejected by the system to
satisfy some or all of the building’s space-heating or service water heating requirements.
(See Appendix A.)
5.2.10.4.
Heat Recovery in Dwelling Units
1) Except for climate zones 4, 5 and 6, where a self-contained mechanical
ventilation system serves a single dwelling unit, the principal exhaust component of the
ventilation system shall be equipped with heat-recovery capability. (See Appendix A.)
2) Heat-recovery ventilators used to meet the requirements of Sentence (1)
shall have a sensible-heat-recovery efficiency, when tested in conformance with the
low-temperature thermal and ventilation test methods described in CAN/CSA-C439,
“Rating the Performance of Heat/Energy-Recovery Ventilators,” of
a) at least 65% at an outside air test temperature of 0°C, and
b) not less than that required by Table 5.2.10.4. for the 2.5% January design
temperature for the building’s location, as listed in Appendix C of Division B
of the NBC.
(See Appendix A.)
5-10 Division B
Amended Page
National Energy Code of Canada for Buildings 2011
Division B
5.2.12.1.
Table 5.2.12.1. (Continued)
Computer Room Air Conditioners
Component or Equipment
Air conditioners, air-cooled
Air conditioners,
water-cooled
Air conditioners,
water-cooled with fluid
economizer
Cooling or Heating
Capacity, kW (Btu/h)
Rating Conditions (1)
Minimum Performance (2)
< 19 (65 000)
SCOP = 2.20 / 2.09
≥ 19 (65 000) and
< 70 (240 000)
SCOP = 2.10 / 1.99
≥ 70 (240 000)
SCOP = 1.90 / 1.79
< 19 (65 000)
SCOP = 2.60 / 2.49
≥ 19 (65 000) and
< 70 (240 000)
—
SCOP = 2.50 / 2.39
≥ 70 (240 000)
SCOP = 2.40 / 2.29
< 19 (65 000)
SCOP = 2.55 / 2.44
≥ 19 (65 000) and
< 70 (240 000)
SCOP = 2.45 / 2.34
≥ 70 (240 000)
< 19 (65 000)
Air conditioners,
glycol-cooled
Standard
SCOP = 2.35 / 2.24
ANSI/ASHRAE 127
SCOP = 2.50 / 2.39
≥ 19 (65 000) and
< 70 (240 000)
SCOP = 2.15 / 2.04
≥ 70 (240 000)
rated at 40% propylene glycol
< 19 (65 000)
SCOP = 2.10 / 1.99
SCOP = 2.45 / 2.34
Air conditioners,
glycol-cooled with fluid
economizer
≥ 19 (65 000) and
< 70 (240 000)
SCOP = 2.10 / 1.99
≥ 70 (240 000)
SCOP = 2.05 / 1.94
< 19 (65 000)
SCOP = 8.00 / 6.06
Chilled water air handler
≥ 19 (65 000) and
< 70 (240 000)
—
≥ 70 (240 000)
SCOP = 9.00 / 7.06
SCOP = 11.00 / 9.06
Packaged Water Chillers
Component or Equipment
Vapour compression, airor water-cooled, electrically
operated
Absorption, single- or
double-effect, indirector direct-fired
Cooling or Heating
Capacity, kW (Btu/h)
Standard
Rating Conditions (1)
Minimum Performance (2)
< 5 600 (19 000 000)
CAN/CSA-C743
—
See standard
National Energy Code of Canada for Buildings 2011
Division B 5-17
5.2.12.1.
Division B
Table 5.2.12.1. (Continued)
Boilers
Component or Equipment
Electric boilers
Cooling or Heating
Capacity, kW (Btu/h)
—
< 88 (300 000)
≥ 88 (300 000) and
< 733 (2 500 000)
Gas-fired boilers (4)
≥ 733 (2 500 000)
Standard
Rating Conditions (1)
Minimum Performance (2)
—
—
(3)
ANSI Z21.13/CSA 4.9
—
AFUE = 85%
ANSI Z21.13/CSA 4.9 or
ASME PTC 4
—
Ec ≥ 82.5%
Et ≥ 83.0%
—
Ec ≥ 83.3%
AFUE ≥ 84.7%
< 88 (300 000)
≥ 88 (300 000) and
< 733 (2 500 000)
Oil-fired boilers
CSA B212 or ASME PTC 4
—
Ec ≥ 85.8%
≥ 733 (2 500 000)
Oil-fired boilers, residual
(No. 5 or No. 6 oil) and other
Et ≥ 83.4%
< 88 (300 000)
CSA B212
≥ 88 (300 000) and
< 733 (2 500 000)
ASME PTC 4
AFUE ≥ 84.7%
—
Et ≥ 83.4%
Ec ≥ 85.8%
≥ 733 (2 500 000)
Warm-Air Furnaces, Combination Warm-Air Furnace/Air-conditioning Units, Duct Furnaces and Unit Heaters
Component or Equipment
Cooling or Heating
Capacity, kW (Btu/h)
Standard
≤ 117.23 (400 000)
Gas-fired warm-air
furnaces (4)(5)
> 117.23 (400 000)
Gas-fired duct furnaces (4)(5)
Gas-fired unit
heaters (4)
Oil-fired warm-air furnaces (5)
Oil-fired duct
unit heaters
furnaces (5)
and
ANSI Z21.47/CSA 2.3
≤ 117.23 (400 000)
ANSI Z83.8/CSA 2.6
≤ 66 (225 000)
CSA B212
Minimum Performance (2)
—
AFUE ≥ 92.4%
Maximum rated capacity,
steady-state
Et ≥ 81%
Minimum rated capacity,
steady-state
Et ≥ 81%
Et ≥ 81%
Et ≥ 82%
—
Et ≥ 84.5%
Et ≥ 81.3%
> 66 (225 000)
—
Rating Conditions (1)
CAN/CSA-B140.4
Et ≥ 81%
Notes to Table 5.2.12.1.:
(1)
(2)
(3)
(4)
(5)
The abbreviations that appear in this column have the following meanings:
db = dry bulb outdoor air temperature
wb = wet bulb outdoor air temperature
The symbols and abbreviations that appear in this column have the following meanings:
AFUE = annual fuel utilization efficiency, in %
Capc = rated cooling capacity, in W(Btu/h)
COP = coefficient of performance, in W/W
Ec = combustion efficiency, in %
EER = energy efficiency ratio, in (Btu/h)/W
Et = thermal efficiency, in %
ICOP = integrated coefficient of performance, in W/W
IPLV = integrated part-load value (no units)
SCOP = sensible coefficient of performance, in downflow units/upflow units (first value is downflow; second value is upflow). The SCOP is a
ratio that is calculated by dividing the net sensible cooling capacity, in W, by the total power input, in W (excluding re-heaters and
humidifiers).
SEER = seasonal energy efficiency ratio, in (Btu/h)/W (no metric equivalent)
No standards address the performance efficiency of electric boilers; however, their efficiency typically approaches 100%.
Includes propane.
Excludes packaged rooftop units.
5-18 Division B
Amended Page
National Energy Code of Canada for Buildings 2011
Division B
Part 6
Service Water Heating Systems
Section 6.1. General
6.1.1.
General
6.1.1.1.
Scope
1) This Part is concerned with the systems used to heat service water.
6.1.1.2.
Application
1) This Part applies to service water heating systems.
6.1.1.3.
Compliance
1) Except as provided in Sentence (2), compliance with this Part shall be achieved
by following
a) the prescriptive path described in Section 6.2.,
b) the trade-off path described in Section 6.3., or
c) the performance path described in Section 6.4. (see A-3.1.1.3.(1)(c) in
Appendix A).
(See Appendix A.)
2) Back-up systems shall comply with the prescriptive requirements stated in
Section 6.2.
6.1.1.4.
Definitions
1) Words that appear in italics are defined in Article 1.4.1.2. of Division A.
Section 6.2. Prescriptive Path
6.2.1.
System Design
6.2.1.1.
Regulations
1) Service water heating systems shall be designed in accordance with the relevant
provincial, territorial or municipal building regulations or, in the absence of such
regulations, or where service water heating systems are not covered by such regulations,
with the National Plumbing Code of Canada 2010.
6.2.2.
Water Heating Equipment and Storage Vessels
6.2.2.1.
Equipment Efficiency
1) Storage-type and non-storage-type service water heaters and pool heaters shall
comply with the performance requirements stated in Table 6.2.2.1. (See Appendix A.)
National Energy Code of Canada for Buildings 2011
Division B 6-1
6.2.2.1.
Division B
Table 6.2.2.1.
Service Water Heating Equipment Performance Standards
Forming Part of Sentences 5.2.12.3.(1), 6.2.2.1.(1), 6.2.2.4.(2), 6.2.2.5.(1), 6.3.2.5.(1) and 6.3.2.6.(1)
Component
Input
≤ 12 kW
Storage-Type and Non-Storage-Type (Instantaneous) Service Water Heaters
Rating
Input/Vt, W/L
Standard
Capacity, L
Vt, L (US gal.)
Conditions
(Btu/h/US gal.)
50 – 270
CAN/CSA-C191
Electric
Heat pump
water heaters
—
> 270
and
≤ 454
> 12 kW
> 454
≤ 24 A
and
≤ 250 V
—
—
ANSI Z21.10.3/CSA 4.3 (2)
< 22 kW
—
Gas-fired
> 117 kW
—
—
CAN/CSA-C745
—
EF ≥ 2.1
—
—
CAN/CSA-P.3
—
EF ≥ 0.67 –
0.0005V
—
< 310 (4000)
Oil-fired,
instantaneous
Others
—
—
≤ 30.5 kW
—
—
< 310 (4000)
≥ 310 (4000)
≤ 190
—
t = 50°C
(90°F)
—
t = 50°C
(90°F)
Et ≥ 77% (3)
EF ≥ 0.59 –
0.0019 V
Et ≥ 78% (3)
SL ≤ 1.3 + 95/Vt (2)
Et ≥ 80% (3)
Et ≥ 77%
SL ≤ 2.3 + 67/Vt (2)
CAN/CSA-B211
> 190
> 190
DOE 10 CFR, Part 430,
Subpart B, Appendix E
Et ≥ 80%
Et ≥ 80% (3)
t = 50°C
(90°F)
ANSI Z21.10.3/CSA 4.3
< 37.8 (10)
Oil-fired,
storage-type
> 30.5 kW
≥ 310 (4000)
—
≥ 37.8 (10)
t = 50°C
(90°F)
ANSI Z21.10.3/CSA 4.3
< 37.8 (10)
≥ 37.8 (10)
≤ 61.5 kW (4)
—
Performance
Requirement (1)
SL ≤ 35 + 0.20V
(top inlet)
SL ≤ 40 + 0.20V
(bottom inlet)
See standard SL ≤ (0.472V)
– 38.5
(top inlet)
SL ≤ (0.472V)
– 33.5
(bottom inlet)
Et ≥ 98%
t = 44.4°C
EF ≥ 0.98
(80°F)
—
—
—
< 310 (4000)
< 37.8 (10)
≥ 37.8 (10)
DOE 10 CFR, Part 430,
Subpart B, Appendix E
ANSI Z21.10.3/CSA 4.3
≥ 310 (4000)
—
EF ≥ 0.55
t = 50°C
(90°F)
—
EF ≥ 0.55
t = 50°C
(90°F)
EF ≥ 0.55
SL ≤ 2.3 + 67/Vt (2)
EF ≥ 0.55
Pool Heaters
Component
Gas-fired (2)
Oil-fired
Input
< 117.2 kW
—
Capacity, L
Vt, L (US gal.)
Input/Vt, W/L
(Btu/h/US gal.)
Standard
Rating
Conditions
—
—
—
ANSI Z21.56/CSA 4.7
—
Performance
Requirement (1)
Et ≥ 78%
Et ≥ 78% (3)
Notes to Table 6.2.2.1.:
(1)
The symbols and abbreviations used in this column have the following meanings:
Vt = tank storage volume, in L, as measured according to the referenced standard
SL = standby losses, in %/h or in W, depending on standard
Et = thermal efficiency with 38.9°C (70°F) water temperature difference
EF = energy factor, in %/h
V = storage volume, in L, as specified by the manufacturer
6-2 Division B
Amended Page
National Energy Code of Canada for Buildings 2011
Division B
6.2.3.1.
Table 6.2.2.1. (Continued)
(2)
(3)
(4)
When testing an electric storage-type service water heater for standby losses using the test procedure described in Section 2.9. of the referenced
standard, the electrical supply voltage shall be maintained within ±1% of the centre of the voltage range specified on the water heater nameplate.
Also, when needed for calculations, the thermal efficiency (Et) shall be 98%.
Includes propane.
Consistent with the US National Appliance Energy Conservation Act of 1987.
6.2.2.2.
Equipment Insulation
1) Except for tanks covered by Article 6.2.2.1., hot service water storage tanks shall
be covered with insulation having a maximum U-value of 0.45 W/(m2·K).
2) Tank insulation referred to in Sentence (1) that is installed in areas where it may
be subject to mechanical damage shall be protected.
6.2.2.3.
Solar Thermal Service Water Heating Equipment
1) Service water heating equipment using solar thermal technology shall be
designed and installed in accordance with
a) the manufacturer’s procedures, or
b) CAN/CSA-F379 SERIES, “Packaged Solar Domestic Hot Water Systems
(Liquid-to-Liquid Heat Transfer).”
6.2.2.4.
Combination Service Water Heating and Space-Heating Equipment
1) Combination service water heating and space-heating equipment is only
permitted to be used where input to the combination equipment is
a) less than 22 kW, or
b) less than twice the design service water heating load.
2) Where combination equipment referred to in Sentence (1) is used, its
performance shall meet the greater of the minimum energy efficiency ratings for service
water heating equipment and space-heating equipment required in the applicable
standards listed in Table 5.2.12.1. or 6.2.2.1. or, where such equipment is not covered in
these Tables, with the Energy Efficiency Act and its Regulations.
6.2.2.5.
Space-Heating Equipment Used for Indirect Service Water Heating
1) Space-heating equipment used solely to provide indirect service water heating or
used to provide a combination of space heating and indirect service water heating shall
meet the greater of the minimum energy efficiency ratings for service water heating
equipment and space-heating equipment required in the applicable standards listed in
Table 5.2.12.1. or 6.2.2.1. or, where such equipment is not covered in these Tables, with
the Energy Efficiency Act and its Regulations.
6.2.3.
Piping
6.2.3.1.
Insulation
1) All piping conveying hot service water in circulating systems, non-circulating
systems without heat traps and non-circulating systems with electric heating elements
along the pipes to maintain temperature shall be insulated in accordance with
Table 6.2.3.1. and Sentences (2) to (4). (See Appendix A.)
2) Where piping insulation has a thermal conductivity, as determined in
accordance with Sentence (4), that is greater than the range given in Table 6.2.3.1., the
thickness given in the Table shall be increased by the ratio u2/u1, where u1 is the value
at the higher end of the conductivity range for the operating temperature and u2 is the
measured thermal conductivity of the insulation at the mean rating temperature.
3) Where piping insulation has a thermal conductivity, as determined in
accordance with Sentence (4), that is lower than the range given in Table 6.2.3.1., the
thickness given in the Table may be decreased by the ratio u2/u1, where u1 is the value
National Energy Code of Canada for Buildings 2011
Amended Page
Division B 6-3
6.2.4.1.
Division B
at the lower end of the conductivity range for the operating temperature and u2 is the
measured thermal conductivity of the insulation at the mean rating temperature.
4) The thermal conductivity of piping insulation at the mean rating temperature
shall be determined in conformance with ASTM C 335/C 335M, “Steady-State Heat
Transfer Properties of Pipe Insulation.”
5) On non-circulating systems with heat traps, the inlet and outlet piping between
the storage or heating vessel and the heat traps as well as the first 2.4 m of outlet piping
downstream of the heat trap, shall be insulated in accordance with Table 6.2.3.1. and
Sentences 5.2.5.3.(5) to (7).
Table 6.2.3.1.
Minimum Thickness of Piping Insulation for Service Water Heating Systems
Forming Part of Sentences 6.2.3.1.(1), (2), (3) and (5)
Thermal Conductivity of Insulation
Location of Piping
Conductivity Range,
W/m·°C
Mean Rating Temperature,
°C
Nominal Pipe Diameter,
in. (mm)
Minimum Thickness of
Piping Insulation, (1) mm
Runouts (1) ≤ 2 (51)
≤ 1 (25.4)
0.035-0.040
Conditioned space
38
1¼ to 2 (32 to 51)
2½ to 4 (64 to 102)
≥ 5 (127)
Runouts (1) ≤ 2 (51)
Unconditioned space
or outside
≤ 1 (25.4)
0.046-0.049
38
25.4
1¼ to 2 (32 to 51)
38.1
38.1
63.5
2½ to 4 (64 to 102)
76.2
≥ 5 (127)
88.9
Notes to Table 6.2.3.1.:
(1)
Applies to recirculating sections of service water heating systems and to the first 2.4 m from storage tanks for non-recirculating systems.
6.2.4.
Controls
6.2.4.1.
Temperature Controls
1) Service water heating systems with storage tanks shall be equipped with
automatic temperature controls capable of adjustment between the lowest and the
highest acceptable temperature settings for the intended use. (See Appendix A.)
6.2.4.2.
Shutdown
1) Except for systems whose storage capacity is less than 100 L, each service water
heating system shall be equipped with a readily accessible and clearly labeled shut-off
device that allows the system, including any heating elements installed along the pipes
to maintain temperature, to be shut-off. (See Appendix A.)
6-4 Division B
Amended Page
National Energy Code of Canada for Buildings 2011
Division B
6.5.1.1.
Section 6.4. Performance Path
(See A-1.1.2.1. in Appendix A.)
6.4.1.
General
6.4.1.1.
Scope
1) Subject to the limitations stated in Article 6.4.1.2., where the service water
heating system does not comply with the requirements of Section 6.2. or 6.3., it shall
comply with Part 8.
6.4.1.2.
Limitations
1) Notwithstanding use of the performance path, all service water heating
appliances and equipment shall comply with the applicable appliance or equipment
energy efficiency act or, in the absence of such an act or where the appliance or
equipment is not covered by such an act, with the applicable performance standard.
2) This Section does not apply to back-up SWH systems, which shall comply
with Sentence 6.1.1.3.(2).
Section 6.5. Objective and Functional Statements
6.5.1.
Objective and Functional Statements
6.5.1.1.
Attributions to Acceptable Solutions
1) For the purpose of compliance with this Code as required in
Clause 1.2.1.1.(1)(b) of Division A, the objective and functional statements attributed to
the acceptable solutions in this Part shall be the objective and functional statements
listed in Table 6.5.1.1. (See A-1.1.3.1.(1) in Appendix A.)
Table 6.5.1.1.
Objectives and Functional Statements Attributed to the
Acceptable Solutions in Part 6
Forming Part of Sentence 6.5.1.1.(1)
Table 6.5.1.1. (Continued)
Functional Statements and Objectives (1)
6.2.3.1. Insulation
(1)
[F92,F93-OE1.1]
6.2.1.1. Regulations
(2)
[F92,F93-OE1.1]
(1)
[F96,F98-OE1.1]
(4)
[F92,F93-OE1.1]
6.2.2.1. Equipment Efficiency
(5)
[F92,F93-OE1.1]
(1)
6.2.4.1. Temperature Controls
Functional Statements and Objectives (1)
[F96,F98-OE1.1]
6.2.2.2. Equipment Insulation
(1)
(1)
[F93,F96-OE1.1]
6.2.4.2. Shutdown
(2)
[F93,F96-OE1.1]
(1)
[F96-OE1.1]
[F96-OE1.1]
6.2.2.3. Solar Thermal Service Water Heating Equipment
6.2.4.3. Maintaining Temperature of Hot Service Water
(1)
(1)
[F96,F98,F99-OE1.1]
[F96-OE1.1]
6.2.2.4. Combination Service Water Heating and Space-Heating
Equipment
6.2.5.1. Remote or Booster Heaters
(1)
[F95,F96,F98,F99-OE1.1]
6.2.6.1. Showers
(2)
[F95,F96,F98,F99-OE1.1]
(1)
[F96-OE1.1]
(2)
[F96-OE1.1]
6.2.2.5. Space-Heating Equipment Used for Indirect Service Water
Heating
(1)
[F95,F96,F98,F99-OE1.1]
National Energy Code of Canada for Buildings 2011
(1)
[F96-OE1.1]
6.2.6.2. Lavatories
(1)
[F96-OE1.1]
Amended Page
Division B 6-9
6.5.1.1.
Division B
Table 6.5.1.1. (Continued)
Functional Statements and Objectives (1)
(2)
[F96-OE1.1]
6.2.7.1. Controls
(1)
[F95,F96,F99-OE1.1]
(2)
[F95,F96,F99-OE1.1]
6.2.7.2. Pool and Hot Tub Covers
(1)
[F95-OE1.1]
(2)
[F95-OE1.1]
6.3.1.1. Application
(1)
[F96,F99-OE1.1]
6.3.1.3. Compliance
(1)
[F96,F99-OE1.1]
6.3.2.1. SWH Trade-off Index
(1)
[F96,F99-OE1.1]
(2)
[F96,F99-OE1.1]
(3)
[F96,F99-OE1.1]
6.3.2.2. Determination of Peak Daily Flow Ratio
(1)
[F96,F99-OE1.1]
6.3.2.3. Determination of Normalized Tank Area
(1)
[F96,F99-OE1.1]
6.3.2.4. Determination of Normalized Tank Diameter
(1)
[F96,F99-OE1.1]
6.3.2.5. Determination of Trade-off Values of Components, ToVi
(1)
[F96,F99-OE1.1]
6.3.2.6. Determination of Reference Heat Generator Efficiency, ηref
(1)
[F96,F99-OE1.1]
6.4.1.2. Limitations
(1)
[F98,F99-OE1.1]
Notes to Table 6.5.1.1.:
(1)
See Parts 2 and 3 of Division A.
6-10 Division B
National Energy Code of Canada for Buildings 2011
Division B
Part 7
Electrical Power Systems and Motors
Section 7.1. General
7.1.1.
General
7.1.1.1.
Scope
1) This Part is concerned with electrical power systems and motors for the
application listed in Article 7.1.1.2.
7.1.1.2.
Application
1) This Part applies to the electrical power systems and motors that are connected
to the building’s electrical service. (See Appendix A.)
7.1.1.3.
Compliance
1) Compliance with this Part shall be achieved by following
a) the prescriptive path described in Section 7.2., or
b) the performance path described in Section 7.4. (see A-3.1.1.3.(1)(c) in
Appendix A).
(See Appendix A.)
7.1.1.4.
Definitions
1) Words that appear in italics are defined in Article 1.4.1.2. of Division A.
Section 7.2. Prescriptive Path
7.2.1.
Electrical Distribution System
7.2.1.1.
Monitoring
(See Appendix A.)
1) Electrical distribution systems whose load-carrying capacity is greater than
250 kVA shall be designed to facilitate the installation of a means to monitor the
electrical energy consumption of
a) HVAC systems,
b) interior lighting, and
c) exterior lighting.
2) The electrical distribution systems of buildings with tenants or dwelling units
shall have a means to separately monitor the electrical energy consumption of the total
building and of each individual tenant or dwelling unit, excluding shared systems.
7.2.2.
Voltage Drop
7.2.2.1.
Feeders
1) Feeder conductors shall be sized for a maximum voltage drop of 2% at design
load.
National Energy Code of Canada for Buildings 2011
Division B 7-1
7.2.2.2.
7.2.2.2.
Division B
Branch Circuits
1) Branch circuit conductors shall be sized for a maximum voltage drop of 3%
at design load.
7.2.3.
Transformers
7.2.3.1.
Transformer Selection
1) Transformers shall conform to
a) CAN/CSA-C802.1, “Minimum Efficiency Values for Liquid-Filled
Distribution Transformers,”
b) CAN/CSA-C802.2, “Minimum Efficiency Values for Dry-Type
Transformers,”or
c) CAN/CSA-C802.3, “Maximum Losses for Power Transformers.”
7.2.4.
Electrical Motors
7.2.4.1.
Efficiency
1) Except for elevator motors and motors that are components of rated equipment,
permanently wired polyphase motors serving the building shall have a nominal
full-load motor efficiency not less than the minimum specified in Tables 3 and 5 of
CSA C390, “Test Methods, Marking Requirements, and Energy Efficiency Levels for
Three-Phase Induction Motors.”
Section 7.3. Trade-off Path (Reserved)
Section 7.4. Performance Path
(See A-1.1.2.1. in Appendix A.)
7.4.1.
General
7.4.1.1.
Scope
1) Where electrical power systems and motors do not comply with the
requirements of Section 7.2., they shall comply with Part 8.
Section 7.5. Objective and Functional Statements
7.5.1.
Objective and Functional Statements
7.5.1.1.
Attributions to Acceptable Solutions
1) For the purpose of compliance with this Code as required in
Clause 1.2.1.1.(1)(b) of Division A, the objective and functional statements attributed to
the acceptable solutions in this Part shall be the objective and functional statements
listed in Table 7.5.1.1. (See A-1.1.3.1.(1) in Appendix A.)
Table 7.5.1.1.
Objectives and Functional Statements Attributed to the
Acceptable Solutions in Part 7
Forming Part of Sentence 7.5.1.1.(1)
Functional Statements and Objectives (1)
7.2.2.1. Feeders
(1)
[F99-OE1.1]
7-2 Division B
Amended Page
National Energy Code of Canada for Buildings 2011
Division B
8.4.4.22.
4) Where more than one energy type is used by the proposed building's service
water heating system,
a) the heating capacities of the reference building's service water heating
equipment shall match the ratio of the proposed building's service water
heating equipment capacity allocation, and
b) the operating schedule, priority of use and other operational characteristics
of the proposed building's use of energy types shall apply.
5) Service water heating equipment performance characteristics as a function of
part-load shall be modeled in accordance with the part-load performance curves found
in Table 8.4.4.22.G.
6) The service water heating system’s supply temperature shall be modeled as being
identical to that of the proposed building. (See Appendix A.)
7) Where a storage tank is to be modeled, the service water heating system's storage
temperature shall be modeled as being identical to that of the proposed building. (See
Appendix A.)
8) Where the proposed building's service water heating system comprises multiple
water heaters, the reference building’s service water heating system shall be modeled
with the same number of water heaters.
9) Where the proposed building's service water heating system is a recirculation
system, the circulation pumps shall be modeled as
a) constant speed operation, and
b) having a flow rate that is identical to that of the proposed building's
circulation pumps.
8.4.4.22.
Part-Load Performance Curves
1) Part-load performance curves for the reference building's systems shall be
calculated in accordance with Tables 8.4.4.22.A. to 8.4.4.22.G., as applicable.
Table 8.4.4.22.A.
Heating Equipment Part-Load Performance Characteristics
Forming Part of Sentences 8.4.4.10.(8) and 8.4.4.22.(1)
Boiler Part-Load
Performance Curve(s)
The fuel consumption at part-load conditions, derived by applying an adjustment factor to the fuel consumption at design
conditions, shall be calculated using the following equation. Condensing and non-condensing boiler curves fit the quadratic
equation of FHeatPLC defined therein. For modulating boilers, values for Qpartload/Qdesign and corresponding values for
FHeatPLC shall be those listed in the last row of this Table.
(1)
where
Fuelpartload = fuel consumption at part-load conditions, in Btu/h,
Fueldesign = fuel consumption at design conditions, in Btu/h, and
FHeatPLC = fuel heating part-load efficiency curve determined
using Equation (2) or values from the last row of this
Table, as applicable.
(2)
where
Qpartload = boiler capacity at part-load conditions, in Btu/h, or
values from the last row of this Table, as applicable,
Qdesign = boiler capacity at design conditions, in Btu/h, or values
from the last row of this Table, as applicable, and
a, b, c = applicable values as follows:
Variable
a
b
c
National Energy Code of Canada for Buildings 2011
Condensing
Boiler
0.00533
0.904
0.09066
Non-condensing
Boiler
0.082597
0.996764
–0.079361
Division B 8-19
8.4.4.22.
Division B
Table 8.4.4.22.A. (Continued)
Furnace Part-Load
Performance Curve(s)
The fuel consumption at part-load conditions, derived by applying an adjustment factor to the fuel consumption at rated
conditions, shall be calculated using the following equation. Condensing and atmospheric furnace curves fit the quadratic
equation of FHeatPLC defined therein. For modulating furnaces, values for Qpartload/Qrated and corresponding values for
FHeatPLC shall be those listed in the last row of this Table.
(3)
where
Fuelpartload = fuel consumption at part-load conditions, in Btu/h,
Fuelrated = fuel consumption at rated conditions, in Btu/h, and
FHeatPLC = fuel heating part-load efficiency curve determined
using Equation (4) or values from the last row of
this Table, as applicable.
(4)
where
Qpartload = furnace capacity at part-load conditions, in Btu/h, or
values from the last row of this Table, as applicable,
Qrated = furnace capacity at rated conditions, in Btu/h, or
values from the last row of this Table, as applicable,
and
a, b, c = applicable values as follows:
Variable
a
b
c
Modulating Boilers
and Furnaces
8-20 Division B
Amended Page
Condensing
Furnace
0.00533
0.904
0.09066
Qpartload, Qrated and Qdesign
(Part-Load Ratio)
0.1
FHeatPLC
0.2
0.209
0.3
0.308
0.4
0.407
0.5
0.506
0.6
0.605
0.7
0.704
0.8
0.802
0.9
0.901
1
1
Atmospheric
Furnace
0.0186100
1.0942090
–0.1128190
0.118
National Energy Code of Canada for Buildings 2011